| Year | Hard | Breaking | Offspeed |
|---|---|---|---|
| 2008 | 15.88 | 31.58 | 21.43 |
| 2009 | 16.53 | 44.93 | 30.30 |
| 2010 | 14.69 | 36.24 | 28.24 |
| 2011 | 20.59 | 32.75 | 40.00 |
| 2012 | 18.57 | 37.98 | 38.10 |
| 2013 | 17.30 | 35.37 | 40.11 |
| 2014 | 18.58 | 36.63 | 40.52 |
| 2015 | 16.45 | 34.85 | 39.06 |
| 2016 | 16.36 | 40.42 | 31.20 |
| 2017 | 15.07 | 35.89 | 30.90 |
| 2018 | 19.76 | 31.07 | 28.33 |
| 2019 | 17.44 | 30.67 | 34.98 |